Anatomy Practical 2 - Elbow Flexors & Extensors

NAU OTD - Mvement 1

Biceps brachii - Long head

Origin: Supraglenoid tubercle of scapula

Insertion: Radial tuberosity; bicipital aponeurosis

Innervation: Musculocutaneous (C5-C6

Action: Elbow Flexor & assists in forearm supination

Biceps brachii - Short head

Origin: Coracoid process of scapula

Insertion: Radial tuberosity; bicipital aponeurosis

Innervation: Musculocutaneous (C5-C6)

Action: Elbow Flexor & assists in forearm supination

Brachialis

Origin: Distal half of anterior humerus

Insertion: Coronoid process and tuberosity of ulna

Innervation: Musculocutaneous (C5-C6); possible radial contribution to lateral portion

Action: Elbow Flexor

Brachioradialis

Origin: Proximal two-thirds of lateral supracondylar ridge of humerus

Insertion: Lateral distal radius near styloid process

Innervation: Radial (C5-C7)

Action: Elbow Flexor

Pronator Teres - Humeral head

Origin: Medial epicondyle of humerus

Insertion: Lateral surface of middle radius

Innervation: Median (C6-C7)

Action: Elbow Flexor (Assists flexion)

Pronator Teres - Ulnar head

Origin: Coronoid process of ulna

Insertion: Lateral surface of middle radius

Innervation: Median (C6-C7)

Action: Elbow Flexor (Assists flexion)

Triceps brachii - long head

Origin: Infraglenoid tubercle of scapula

Insertion: Olecranon of ulna

Innervation: Radial (C6-C8)

Action: Elbow Extension

Triceps brachii - lateral head

Origin: Posterior humerus superior to radial groove

Insertion: Olecranon of ulna

Innervation: Radial (C6-C8)

Action: Elbow Extension

Triceps brachii - medial head

Origin: Posterior humerus inferior to radial groove

Insertion: Olecranon of ulna

Innervation: Radial (C6-C8)

Action: Elbow Extension

Anconeus

Origin: Lateral epicondyle of humerus

Insertion: Lateral olecranon and proximal posterior ulna

Innervation: Radial (C7-T1)

Action: Elbow Extension